1 files changed, 889 insertions, 0 deletions

diff --git a/src/rw/VisibilityPlugins.cpp b/src/rw/VisibilityPlugins.cpp
new file mode 100644
index 00000000..f8b1f6b2
--- /dev/null
+++ b/src/rw/VisibilityPlugins.cpp
@@ -0,0 +1,889 @@
+#include "common.h"
+#include "patcher.h"
+#include "templates.h"
+#include "Entity.h"
+#include "ModelInfo.h"
+#include "Lights.h"
+#include "Renderer.h"
+#include "Camera.h"
+#include "VisibilityPlugins.h"
+#include "World.h"
+
+#define FADE_DISTANCE 20.0f
+
+/*
+CLinkList<CVisibilityPlugins::AlphaObjectInfo> CVisibilityPlugins::m_alphaList;
+CLinkList<CVisibilityPlugins::AlphaObjectInfo> CVisibilityPlugins::m_alphaEntityList;
+
+int32 CVisibilityPlugins::ms_atomicPluginOffset = -1;
+int32 CVisibilityPlugins::ms_framePluginOffset = -1;
+int32 CVisibilityPlugins::ms_clumpPluginOffset = -1;
+*/
+CLinkList<CVisibilityPlugins::AlphaObjectInfo> &CVisibilityPlugins::m_alphaList = *(CLinkList<CVisibilityPlugins::AlphaObjectInfo>*)0x8F42E4;
+CLinkList<CVisibilityPlugins::AlphaObjectInfo> &CVisibilityPlugins::m_alphaEntityList = *(CLinkList<CVisibilityPlugins::AlphaObjectInfo>*)0x943084;
+
+int32 &CVisibilityPlugins::ms_atomicPluginOffset = *(int32*)0x600124;
+int32 &CVisibilityPlugins::ms_framePluginOffset = *(int32*)0x600128;
+int32 &CVisibilityPlugins::ms_clumpPluginOffset = *(int32*)0x60012C;
+
+RwCamera *&CVisibilityPlugins::ms_pCamera = *(RwCamera**)0x8F2514;
+RwV3d *&CVisibilityPlugins::ms_pCameraPosn = *(RwV3d**)0x8F6270;
+float &CVisibilityPlugins::ms_cullCompsDist = *(float*)0x8F2BC4;
+float &CVisibilityPlugins::ms_vehicleLod0Dist = *(float*)0x885B28;
+float &CVisibilityPlugins::ms_vehicleLod1Dist = *(float*)0x885B30;
+float &CVisibilityPlugins::ms_vehicleFadeDist = *(float*)0x8E28B4;
+float &CVisibilityPlugins::ms_bigVehicleLod0Dist = *(float*)0x8E2A84;
+float &CVisibilityPlugins::ms_bigVehicleLod1Dist = *(float*)0x8E2A8C;
+float &CVisibilityPlugins::ms_pedLod0Dist = *(float*)0x8F2BD4;
+float &CVisibilityPlugins::ms_pedLod1Dist = *(float*)0x8F2BD8;
+float &CVisibilityPlugins::ms_pedFadeDist = *(float*)0x8E2C34;
+
+void
+CVisibilityPlugins::Initialise(void)
+{
+	m_alphaList.Init(20);
+	m_alphaList.head.item.sort = 0.0f;
+	m_alphaList.tail.item.sort = 100000000.0f;
+	m_alphaEntityList.Init(150);
+	m_alphaEntityList.head.item.sort = 0.0f;
+	m_alphaEntityList.tail.item.sort = 100000000.0f;
+}
+
+void
+CVisibilityPlugins::Shutdown(void)
+{
+	m_alphaList.Shutdown();
+	m_alphaEntityList.Shutdown();
+}
+
+void
+CVisibilityPlugins::InitAlphaEntityList(void)
+{
+	m_alphaEntityList.Clear();
+}
+
+bool
+CVisibilityPlugins::InsertEntityIntoSortedList(CEntity *e, float dist)
+{
+	AlphaObjectInfo item;
+	item.entity = e;
+	item.sort = dist;
+	bool ret = !!m_alphaEntityList.InsertSorted(item);
+//	if(!ret)
+//		printf("list full %d\n", m_alphaEntityList.Count());
+	return ret;
+}
+
+void
+CVisibilityPlugins::InitAlphaAtomicList(void)
+{
+	m_alphaList.Clear();
+}
+
+bool
+CVisibilityPlugins::InsertAtomicIntoSortedList(RpAtomic *a, float dist)
+{
+	AlphaObjectInfo item;
+	item.atomic = a;
+	item.sort = dist;
+	bool ret = !!m_alphaList.InsertSorted(item);
+//	if(!ret)
+//		printf("list full %d\n", m_alphaList.Count());
+	return ret;
+}
+
+void
+CVisibilityPlugins::SetRenderWareCamera(RwCamera *camera)
+{
+	ms_pCamera = camera;
+	ms_pCameraPosn = RwMatrixGetPos(RwFrameGetMatrix(RwCameraGetFrame(camera)));
+
+	if(TheCamera.Cams[TheCamera.ActiveCam].Mode == CCam::MODE_TOPDOWN ||
+	   TheCamera.Cams[TheCamera.ActiveCam].Mode == CCam::MODE_TOP_DOWN_PED)
+		ms_cullCompsDist = 1000000.0f;
+	else
+		ms_cullCompsDist = sq(TheCamera.LODDistMultiplier * 20.0f);
+
+        ms_vehicleLod0Dist = sq(70.0f * TheCamera.GenerationDistMultiplier);
+        ms_vehicleLod1Dist = sq(90.0f * TheCamera.GenerationDistMultiplier);
+        ms_vehicleFadeDist = sq(100.0f * TheCamera.GenerationDistMultiplier);
+        ms_bigVehicleLod0Dist = sq(60.0f * TheCamera.GenerationDistMultiplier);
+        ms_bigVehicleLod1Dist = sq(150.0f * TheCamera.GenerationDistMultiplier);
+        ms_pedLod0Dist = sq(25.0f * TheCamera.LODDistMultiplier);
+        ms_pedLod1Dist = sq(60.0f * TheCamera.LODDistMultiplier);
+        ms_pedFadeDist = sq(70.0f * TheCamera.LODDistMultiplier);
+}
+
+RpMaterial*
+SetAlphaCB(RpMaterial *material, void *data)
+{
+	((RwRGBA*)RpMaterialGetColor(material))->alpha = (uint8)(uint32)data;
+	return material;
+}
+
+RpMaterial*
+SetTextureCB(RpMaterial *material, void *data)
+{
+	RpMaterialSetTexture(material, (RwTexture*)data);
+	return material;
+}
+
+void
+CVisibilityPlugins::RenderAlphaAtomics(void)
+{
+	CLink<AlphaObjectInfo> *node;
+	for(node = m_alphaList.tail.prev;
+	    node != &m_alphaList.head;
+	    node = node->prev)
+		AtomicDefaultRenderCallBack(node->item.atomic);
+}
+
+void
+CVisibilityPlugins::RenderFadingEntities(void)
+{
+	CLink<AlphaObjectInfo> *node;
+	CSimpleModelInfo *mi;
+	for(node = m_alphaEntityList.tail.prev;
+	    node != &m_alphaEntityList.head;
+	    node = node->prev){
+		CEntity *e = node->item.entity;
+		if(e->m_rwObject == nil)
+			continue;
+		mi = (CSimpleModelInfo*)CModelInfo::GetModelInfo(e->m_modelIndex);
+		if(mi->m_noZwrite)
+			RwRenderStateSet(rwRENDERSTATEZWRITEENABLE, FALSE);
+
+		if(e->bDistanceFade){
+			DeActivateDirectional();
+			SetAmbientColours();
+			e->bImBeingRendered = true;
+			RenderFadingAtomic((RpAtomic*)e->m_rwObject, node->item.sort);
+			e->bImBeingRendered = false;
+		}else
+			CRenderer::RenderOneNonRoad(e);
+
+		if(mi->m_noZwrite)
+			RwRenderStateSet(rwRENDERSTATEZWRITEENABLE, (void*)TRUE);
+	}
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderWheelAtomicCB(RpAtomic *atomic)
+{
+	RpAtomic *lodatm;
+	RwMatrix *m;
+	RwV3d view;
+	float len;
+	CSimpleModelInfo *mi;
+
+	mi = GetAtomicModelInfo(atomic);
+	m = RwFrameGetLTM(RpAtomicGetFrame(atomic));
+	RwV3dSub(&view, RwMatrixGetPos(m), ms_pCameraPosn);
+	len = RwV3dLength(&view);
+	lodatm = mi->GetAtomicFromDistance(len);
+	if(lodatm){
+		if(RpAtomicGetGeometry(lodatm) != RpAtomicGetGeometry(atomic))
+			RpAtomicSetGeometry(atomic, RpAtomicGetGeometry(lodatm), rpATOMICSAMEBOUNDINGSPHERE);
+		AtomicDefaultRenderCallBack(atomic);
+	}
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderObjNormalAtomic(RpAtomic *atomic)
+{
+	RwMatrix *m;
+	RwV3d view;
+	float len;
+
+	m = RwFrameGetLTM(RpAtomicGetFrame(atomic));
+	RwV3dSub(&view, RwMatrixGetPos(m), ms_pCameraPosn);
+	len = RwV3dLength(&view);
+	if(RwV3dDotProduct(&view, RwMatrixGetUp(m)) < -0.3f*len && len > 8.0f)
+		return atomic;
+	AtomicDefaultRenderCallBack(atomic);
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderAlphaAtomic(RpAtomic *atomic, int alpha)
+{
+	RpGeometry *geo;
+	uint32 flags;
+
+	geo = RpAtomicGetGeometry(atomic);
+	flags = RpGeometryGetFlags(geo);
+	RpGeometrySetFlags(geo, flags | rpGEOMETRYMODULATEMATERIALCOLOR);
+	RpGeometryForAllMaterials(geo, SetAlphaCB, (void*)alpha);
+	AtomicDefaultRenderCallBack(atomic);
+	RpGeometryForAllMaterials(geo, SetAlphaCB, (void*)255);
+	RpGeometrySetFlags(geo, flags);
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderFadingAtomic(RpAtomic *atomic, float camdist)
+{
+	RpAtomic *lodatm;
+	float fadefactor;
+	uint8 alpha;
+	CSimpleModelInfo *mi;
+
+	mi = GetAtomicModelInfo(atomic);
+	lodatm = mi->GetAtomicFromDistance(camdist - FADE_DISTANCE);
+	if(mi->m_additive){
+		RwRenderStateSet(rwRENDERSTATEDESTBLEND, (void*)rwBLENDONE);
+		AtomicDefaultRenderCallBack(atomic);
+		RwRenderStateSet(rwRENDERSTATEDESTBLEND, (void*)rwBLENDINVSRCALPHA);
+	}else{
+		fadefactor = (mi->GetLargestLodDistance() - (camdist - FADE_DISTANCE))/FADE_DISTANCE;
+		if(fadefactor > 1.0f)
+			fadefactor = 1.0f;
+		alpha = mi->m_alpha * fadefactor;
+		if(alpha == 255)
+			AtomicDefaultRenderCallBack(atomic);
+		else{
+			RpGeometry *geo = RpAtomicGetGeometry(lodatm);
+			uint32 flags = RpGeometryGetFlags(geo);
+			RpGeometrySetFlags(geo, flags | rpGEOMETRYMODULATEMATERIALCOLOR);
+			RpGeometryForAllMaterials(geo, SetAlphaCB, (void*)alpha);
+			if(geo != RpAtomicGetGeometry(atomic))
+				RpAtomicSetGeometry(atomic, geo, rpATOMICSAMEBOUNDINGSPHERE); // originally 5 (mistake?)
+			AtomicDefaultRenderCallBack(atomic);
+			RpGeometryForAllMaterials(geo, SetAlphaCB, (void*)255);
+			RpGeometrySetFlags(geo, flags);
+		}
+	}
+	return atomic;
+}
+
+
+
+RpAtomic*
+CVisibilityPlugins::RenderVehicleHiDetailCB(RpAtomic *atomic)
+{
+	RwFrame *clumpframe;
+	float distsq, dot;
+	uint32 flags;
+
+	clumpframe = RpClumpGetFrame(RpAtomicGetClump(atomic));
+	distsq = GetDistanceSquaredFromCamera(clumpframe);
+	if(distsq < ms_vehicleLod0Dist){
+		flags = GetAtomicId(atomic);
+		if(distsq > ms_cullCompsDist && (flags & ATOMIC_FLAG_NOCULL) == 0){
+			dot = GetDotProductWithCameraVector(RwFrameGetLTM(RpAtomicGetFrame(atomic)),
+				RwFrameGetLTM(clumpframe), flags);
+			if(dot > 0.0f && ((flags & ATOMIC_FLAG_ANGLECULL) || 0.1f*distsq < dot*dot))
+				return atomic;
+		}
+		AtomicDefaultRenderCallBack(atomic);
+	}
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderVehicleHiDetailAlphaCB(RpAtomic *atomic)
+{
+	RwFrame *clumpframe;
+	float distsq, dot;
+	uint32 flags;
+
+	clumpframe = RpClumpGetFrame(RpAtomicGetClump(atomic));
+	distsq = GetDistanceSquaredFromCamera(clumpframe);
+	if(distsq < ms_vehicleLod0Dist){
+		flags = GetAtomicId(atomic);
+		dot = GetDotProductWithCameraVector(RwFrameGetLTM(RpAtomicGetFrame(atomic)),
+			RwFrameGetLTM(clumpframe), flags);
+		if(distsq > ms_cullCompsDist && (flags & ATOMIC_FLAG_NOCULL) == 0)
+			if(dot > 0.0f && ((flags & ATOMIC_FLAG_ANGLECULL) || 0.1f*distsq < dot*dot))
+				return atomic;
+
+		if(flags & ATOMIC_FLAG_DRAWLAST){
+			// sort before clump
+			if(!InsertAtomicIntoSortedList(atomic, distsq - 0.0001f))
+				AtomicDefaultRenderCallBack(atomic);
+		}else{
+			if(!InsertAtomicIntoSortedList(atomic, distsq + dot))
+				AtomicDefaultRenderCallBack(atomic);
+		}
+	}
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderVehicleHiDetailCB_BigVehicle(RpAtomic *atomic)
+{
+	RwFrame *clumpframe;
+	float distsq, dot;
+	uint32 flags;
+
+	clumpframe = RpClumpGetFrame(RpAtomicGetClump(atomic));
+	distsq = GetDistanceSquaredFromCamera(clumpframe);
+	if(distsq < ms_bigVehicleLod0Dist){
+		flags = GetAtomicId(atomic);
+		if(distsq > ms_cullCompsDist && (flags & ATOMIC_FLAG_NOCULL) == 0){
+			dot = GetDotProductWithCameraVector(RwFrameGetLTM(RpAtomicGetFrame(atomic)),
+				RwFrameGetLTM(clumpframe), flags);
+			if(dot > 0.0f)
+				return atomic;
+		}
+		AtomicDefaultRenderCallBack(atomic);
+	}
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderVehicleHiDetailAlphaCB_BigVehicle(RpAtomic *atomic)
+{
+	RwFrame *clumpframe;
+	float distsq, dot;
+	uint32 flags;
+
+	clumpframe = RpClumpGetFrame(RpAtomicGetClump(atomic));
+	distsq = GetDistanceSquaredFromCamera(clumpframe);
+	if(distsq < ms_bigVehicleLod0Dist){
+		flags = GetAtomicId(atomic);
+		dot = GetDotProductWithCameraVector(RwFrameGetLTM(RpAtomicGetFrame(atomic)),
+			RwFrameGetLTM(clumpframe), flags);
+		if(dot > 0.0f)
+			if(distsq > ms_cullCompsDist && (flags & ATOMIC_FLAG_NOCULL) == 0)
+				return atomic;
+
+		if(!InsertAtomicIntoSortedList(atomic, distsq + dot))
+			AtomicDefaultRenderCallBack(atomic);
+	}
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderVehicleHiDetailCB_Boat(RpAtomic *atomic)
+{
+	RwFrame *clumpframe;
+	float distsq;
+
+	clumpframe = RpClumpGetFrame(RpAtomicGetClump(atomic));
+	distsq = GetDistanceSquaredFromCamera(clumpframe);
+	if(distsq < ms_bigVehicleLod1Dist)
+		AtomicDefaultRenderCallBack(atomic);
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderVehicleLowDetailCB_BigVehicle(RpAtomic *atomic)
+{
+	RwFrame *clumpframe;
+	float distsq, dot;
+	uint32 flags;
+
+	clumpframe = RpClumpGetFrame(RpAtomicGetClump(atomic));
+	distsq = GetDistanceSquaredFromCamera(clumpframe);
+	if(distsq >= ms_bigVehicleLod0Dist &&
+	   distsq < ms_bigVehicleLod1Dist){
+		flags = GetAtomicId(atomic);
+		if(distsq > ms_cullCompsDist && (flags & ATOMIC_FLAG_NOCULL) == 0){
+			dot = GetDotProductWithCameraVector(RwFrameGetLTM(RpAtomicGetFrame(atomic)),
+				RwFrameGetLTM(clumpframe), flags);
+			if(dot > 0.0f)
+				return atomic;
+		}
+		AtomicDefaultRenderCallBack(atomic);
+	}
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderVehicleLowDetailAlphaCB_BigVehicle(RpAtomic *atomic)
+{
+	RwFrame *clumpframe;
+	float distsq, dot;
+	uint32 flags;
+
+	clumpframe = RpClumpGetFrame(RpAtomicGetClump(atomic));
+	distsq = GetDistanceSquaredFromCamera(clumpframe);
+	if(distsq >= ms_bigVehicleLod0Dist &&
+	   distsq < ms_bigVehicleLod1Dist){
+		flags = GetAtomicId(atomic);
+		dot = GetDotProductWithCameraVector(RwFrameGetLTM(RpAtomicGetFrame(atomic)),
+			RwFrameGetLTM(clumpframe), flags);
+		if(dot > 0.0f)
+			if(distsq > ms_cullCompsDist && (flags & ATOMIC_FLAG_NOCULL) == 0)
+				return atomic;
+
+		if(!InsertAtomicIntoSortedList(atomic, distsq + dot))
+			AtomicDefaultRenderCallBack(atomic);
+	}
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderVehicleReallyLowDetailCB(RpAtomic *atomic)
+{
+	RpClump *clump;
+	float dist;
+	int32 alpha;
+
+	clump = RpAtomicGetClump(atomic);
+	dist = GetDistanceSquaredFromCamera(RpClumpGetFrame(clump));
+	if(dist >= ms_vehicleLod0Dist){
+		alpha = GetClumpAlpha(clump);
+		if(alpha == 255)
+			AtomicDefaultRenderCallBack(atomic);
+		else
+			RenderAlphaAtomic(atomic, alpha);
+	}
+	return atomic;
+
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderVehicleReallyLowDetailCB_BigVehicle(RpAtomic *atomic)
+{
+	RwFrame *clumpframe;
+	float distsq;
+
+	clumpframe = RpClumpGetFrame(RpAtomicGetClump(atomic));
+	distsq = GetDistanceSquaredFromCamera(clumpframe);
+	if(distsq >= ms_bigVehicleLod1Dist)
+		AtomicDefaultRenderCallBack(atomic);
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderTrainHiDetailCB(RpAtomic *atomic)
+{
+	RwFrame *clumpframe;
+	float distsq, dot;
+	uint32 flags;
+
+	clumpframe = RpClumpGetFrame(RpAtomicGetClump(atomic));
+	distsq = GetDistanceSquaredFromCamera(clumpframe);
+	if(distsq < ms_bigVehicleLod1Dist){
+		flags = GetAtomicId(atomic);
+		if(distsq > ms_cullCompsDist && (flags & ATOMIC_FLAG_NOCULL) == 0){
+			dot = GetDotProductWithCameraVector(RwFrameGetLTM(RpAtomicGetFrame(atomic)),
+				RwFrameGetLTM(clumpframe), flags);
+			if(dot > 0.0f && ((flags & ATOMIC_FLAG_ANGLECULL) || 0.1f*distsq < dot*dot))
+				return atomic;
+		}
+		AtomicDefaultRenderCallBack(atomic);
+	}
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderTrainHiDetailAlphaCB(RpAtomic *atomic)
+{
+	RwFrame *clumpframe;
+	float distsq, dot;
+	uint32 flags;
+
+	clumpframe = RpClumpGetFrame(RpAtomicGetClump(atomic));
+	distsq = GetDistanceSquaredFromCamera(clumpframe);
+	if(distsq < ms_bigVehicleLod1Dist){
+		flags = GetAtomicId(atomic);
+		dot = GetDotProductWithCameraVector(RwFrameGetLTM(RpAtomicGetFrame(atomic)),
+			RwFrameGetLTM(clumpframe), flags);
+		if(distsq > ms_cullCompsDist && (flags & ATOMIC_FLAG_NOCULL) == 0)
+			if(dot > 0.0f && ((flags & ATOMIC_FLAG_ANGLECULL) || 0.1f*distsq < dot*dot))
+				return atomic;
+
+		if(flags & ATOMIC_FLAG_DRAWLAST){
+			// sort before clump
+			if(!InsertAtomicIntoSortedList(atomic, distsq - 0.0001f))
+				AtomicDefaultRenderCallBack(atomic);
+		}else{
+			if(!InsertAtomicIntoSortedList(atomic, distsq + dot))
+				AtomicDefaultRenderCallBack(atomic);
+		}
+	}
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderPlayerCB(RpAtomic *atomic)
+{
+	if(CWorld::Players[0].m_pSkinTexture)
+		RpGeometryForAllMaterials(RpAtomicGetGeometry(atomic), SetTextureCB, CWorld::Players[0].m_pSkinTexture);
+	AtomicDefaultRenderCallBack(atomic);
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderPedLowDetailCB(RpAtomic *atomic)
+{
+	RpClump *clump;
+	float dist;
+	int32 alpha;
+
+	clump = RpAtomicGetClump(atomic);
+	dist = GetDistanceSquaredFromCamera(RpClumpGetFrame(clump));
+	if(dist >= ms_pedLod0Dist){
+		alpha = GetClumpAlpha(clump);
+		if(alpha == 255)
+			AtomicDefaultRenderCallBack(atomic);
+		else
+			RenderAlphaAtomic(atomic, alpha);
+	}
+	return atomic;
+}
+
+RpAtomic*
+CVisibilityPlugins::RenderPedHiDetailCB(RpAtomic *atomic)
+{
+	RpClump *clump;
+	float dist;
+	int32 alpha;
+
+	clump = RpAtomicGetClump(atomic);
+	dist = GetDistanceSquaredFromCamera(RpClumpGetFrame(clump));
+	if(dist < ms_pedLod0Dist){
+		alpha = GetClumpAlpha(clump);
+		if(alpha == 255)
+			AtomicDefaultRenderCallBack(atomic);
+		else
+			RenderAlphaAtomic(atomic, alpha);
+	}
+	return atomic;
+}
+
+float
+CVisibilityPlugins::GetDistanceSquaredFromCamera(RwFrame *frame)
+{
+	RwMatrix *m;
+	RwV3d dist;
+	m = RwFrameGetLTM(frame);
+	RwV3dSub(&dist, RwMatrixGetPos(m), ms_pCameraPosn);
+	return RwV3dDotProduct(&dist, &dist);
+}
+
+float
+CVisibilityPlugins::GetDotProductWithCameraVector(RwMatrix *atomicMat, RwMatrix *clumpMat, uint32 flags)
+{
+	RwV3d dist;
+	float dot, dotdoor;
+
+	// Vehicle forward is the y axis (RwMatrix.up)
+	// Vehicle right is the x axis (RwMatrix.right)
+
+	RwV3dSub(&dist, RwMatrixGetPos(atomicMat), ms_pCameraPosn);
+	// forward/backward facing
+	if(flags & (ATOMIC_FLAG_FRONT | ATOMIC_FLAG_REAR))
+		dot = RwV3dDotProduct(&dist, RwMatrixGetUp(clumpMat));
+	// left/right facing
+	else if(flags & (ATOMIC_FLAG_LEFT | ATOMIC_FLAG_RIGHT))
+		dot = RwV3dDotProduct(&dist, RwMatrixGetRight(clumpMat));
+	else
+		dot = 0.0f;
+	if(flags & (ATOMIC_FLAG_LEFT | ATOMIC_FLAG_REAR))
+		dot = -dot;
+
+	if(flags & (ATOMIC_FLAG_REARDOOR | ATOMIC_FLAG_FRONTDOOR)){
+		if(flags & ATOMIC_FLAG_REARDOOR)
+			dotdoor = -RwV3dDotProduct(&dist, RwMatrixGetUp(clumpMat));
+		else if(flags & ATOMIC_FLAG_FRONTDOOR)
+			dotdoor = RwV3dDotProduct(&dist, RwMatrixGetUp(clumpMat));
+		else
+			dotdoor = 0.0f;
+
+		if(dot < 0.0f && dotdoor < 0.0f)
+			dot += dotdoor;
+		if(dot > 0.0f && dotdoor > 0.0f)
+			dot += dotdoor;
+	}
+
+	return dot;
+}
+
+/* These are all unused */
+
+bool
+CVisibilityPlugins::DefaultVisibilityCB(RpClump *clump)
+{
+	return true;
+}
+
+bool
+CVisibilityPlugins::FrustumSphereCB(RpClump *clump)
+{
+	RwSphere sphere;
+	RwFrame *frame = RpClumpGetFrame(clump);
+
+	CClumpModelInfo *modelInfo = (CClumpModelInfo*)GetFrameHierarchyId(frame);
+	sphere.radius = modelInfo->GetColModel()->boundingSphere.radius;
+	sphere.center.x = modelInfo->GetColModel()->boundingSphere.center.x;
+	sphere.center.y = modelInfo->GetColModel()->boundingSphere.center.y;
+	sphere.center.z = modelInfo->GetColModel()->boundingSphere.center.z;
+	RwV3dTransformPoints(&sphere.center, &sphere.center, 1, RwFrameGetLTM(frame));
+	return RwCameraFrustumTestSphere(ms_pCamera, &sphere) != rwSPHEREOUTSIDE;
+}
+
+bool
+CVisibilityPlugins::VehicleVisibilityCB(RpClump *clump)
+{
+	if (GetDistanceSquaredFromCamera(RpClumpGetFrame(clump)) <= ms_vehicleLod1Dist)
+		return FrustumSphereCB(clump);
+	return false;
+}
+
+bool
+CVisibilityPlugins::VehicleVisibilityCB_BigVehicle(RpClump *clump)
+{
+	return FrustumSphereCB(clump);
+}
+
+
+
+
+//
+// RW Plugins
+//
+
+enum
+{
+	ID_VISIBILITYATOMIC = MAKECHUNKID(rwVENDORID_ROCKSTAR, 0x00),
+	ID_VISIBILITYCLUMP  = MAKECHUNKID(rwVENDORID_ROCKSTAR, 0x01),
+	ID_VISIBILITYFRAME  = MAKECHUNKID(rwVENDORID_ROCKSTAR, 0x02),
+};
+
+bool
+CVisibilityPlugins::PluginAttach(void)
+{
+	ms_atomicPluginOffset = RpAtomicRegisterPlugin(sizeof(AtomicExt),
+		ID_VISIBILITYATOMIC,
+		AtomicConstructor, AtomicDestructor, AtomicCopyConstructor);
+
+	ms_framePluginOffset = RwFrameRegisterPlugin(sizeof(FrameExt),
+		ID_VISIBILITYFRAME,
+		FrameConstructor, FrameDestructor, FrameCopyConstructor);
+
+	ms_clumpPluginOffset = RpClumpRegisterPlugin(sizeof(ClumpExt),
+		ID_VISIBILITYCLUMP,
+		ClumpConstructor, ClumpDestructor, ClumpCopyConstructor);
+	return ms_atomicPluginOffset != -1 && ms_clumpPluginOffset != -1;
+}
+
+#define ATOMICEXT(o) (RWPLUGINOFFSET(AtomicExt, o, ms_atomicPluginOffset))
+#define FRAMEEXT(o) (RWPLUGINOFFSET(FrameExt, o, ms_framePluginOffset))
+#define CLUMPEXT(o) (RWPLUGINOFFSET(ClumpExt, o, ms_clumpPluginOffset))
+
+//
+// Atomic
+//
+
+void*
+CVisibilityPlugins::AtomicConstructor(void *object, int32, int32)
+{
+	ATOMICEXT(object)->modelInfo = nil;
+	return object;
+}
+
+void*
+CVisibilityPlugins::AtomicDestructor(void *object, int32, int32)
+{
+	return object;
+}
+
+void*
+CVisibilityPlugins::AtomicCopyConstructor(void *dst, const void *src, int32, int32)
+{
+	*ATOMICEXT(dst) = *ATOMICEXT(src);
+	return dst;
+}
+
+void
+CVisibilityPlugins::SetAtomicModelInfo(RpAtomic *atomic,
+                                       CSimpleModelInfo *modelInfo)
+{
+	AtomicExt *ext = ATOMICEXT(atomic);
+	ext->modelInfo = modelInfo;
+	switch(modelInfo->m_type)
+	case MITYPE_SIMPLE:
+	case MITYPE_TIME:
+		if(modelInfo->m_normalCull)
+			SetAtomicRenderCallback(atomic, RenderObjNormalAtomic);
+}
+
+CSimpleModelInfo*
+CVisibilityPlugins::GetAtomicModelInfo(RpAtomic *atomic)
+{
+	return ATOMICEXT(atomic)->modelInfo;
+}
+
+void
+CVisibilityPlugins::SetAtomicFlag(RpAtomic *atomic, int f)
+{
+	ATOMICEXT(atomic)->flags |= f;
+}
+
+void
+CVisibilityPlugins::ClearAtomicFlag(RpAtomic *atomic, int f)
+{
+	ATOMICEXT(atomic)->flags &= ~f;
+}
+
+int
+CVisibilityPlugins::GetAtomicId(RpAtomic *atomic)
+{
+	return ATOMICEXT(atomic)->flags;
+}
+
+// This is rather useless, but whatever
+void
+CVisibilityPlugins::SetAtomicRenderCallback(RpAtomic *atomic, RpAtomicCallBackRender cb)
+{
+	if(cb == nil)
+		cb = AtomicDefaultRenderCallBack;	// not necessary
+	RpAtomicSetRenderCallBack(atomic, cb);
+}
+
+//
+// Frame
+//
+
+void*
+CVisibilityPlugins::FrameConstructor(void *object, int32, int32)
+{
+	FRAMEEXT(object)->id = 0;
+	return object;
+}
+
+void*
+CVisibilityPlugins::FrameDestructor(void *object, int32, int32)
+{
+	return object;
+}
+
+void*
+CVisibilityPlugins::FrameCopyConstructor(void *dst, const void *src, int32, int32)
+{
+	*FRAMEEXT(dst) = *FRAMEEXT(src);
+	return dst;
+}
+
+void
+CVisibilityPlugins::SetFrameHierarchyId(RwFrame *frame, int32 id)
+{
+	FRAMEEXT(frame)->id = id;
+}
+
+int32
+CVisibilityPlugins::GetFrameHierarchyId(RwFrame *frame)
+{
+	return FRAMEEXT(frame)->id;
+}
+
+
+//
+// Clump
+//
+
+void*
+CVisibilityPlugins::ClumpConstructor(void *object, int32, int32)
+{
+	ClumpExt *ext = CLUMPEXT(object);
+	ext->visibilityCB = DefaultVisibilityCB;
+	ext->alpha = 0xFF;
+	return object;
+}
+
+void*
+CVisibilityPlugins::ClumpDestructor(void *object, int32, int32)
+{
+	return object;
+}
+
+void*
+CVisibilityPlugins::ClumpCopyConstructor(void *dst, const void *src, int32, int32)
+{
+	CLUMPEXT(dst)->visibilityCB = CLUMPEXT(src)->visibilityCB;
+	return dst;
+}
+
+void
+CVisibilityPlugins::SetClumpModelInfo(RpClump *clump, CClumpModelInfo *modelInfo)
+{
+	CVehicleModelInfo *vmi;
+	SetFrameHierarchyId(RpClumpGetFrame(clump), (int32)modelInfo);
+
+	// Unused
+	switch(modelInfo->m_type){
+	// ignore MLO
+	case MITYPE_VEHICLE:
+		vmi = (CVehicleModelInfo*)modelInfo;
+		if(vmi->m_vehicleType == VEHICLE_TYPE_TRAIN || 
+		   vmi->m_vehicleType == VEHICLE_TYPE_HELI || 
+		   vmi->m_vehicleType == VEHICLE_TYPE_PLANE)
+			CLUMPEXT(clump)->visibilityCB = VehicleVisibilityCB_BigVehicle;
+		else
+			CLUMPEXT(clump)->visibilityCB = VehicleVisibilityCB;
+		break;
+	}
+}
+
+void
+CVisibilityPlugins::SetClumpAlpha(RpClump *clump, int alpha)
+{
+	CLUMPEXT(clump)->alpha = alpha;
+}
+
+int
+CVisibilityPlugins::GetClumpAlpha(RpClump *clump)
+{
+	return CLUMPEXT(clump)->alpha;
+}
+
+
+STARTPATCHES
+	InjectHook(0x527E50, CVisibilityPlugins::Initialise, PATCH_JUMP);
+	InjectHook(0x527EA0, CVisibilityPlugins::Shutdown, PATCH_JUMP);
+	InjectHook(0x528F90, CVisibilityPlugins::InitAlphaEntityList, PATCH_JUMP);
+	InjectHook(0x528FF0, CVisibilityPlugins::InsertEntityIntoSortedList, PATCH_JUMP);
+	InjectHook(0x528F80, CVisibilityPlugins::InitAlphaAtomicList, PATCH_JUMP);
+	InjectHook(0x528FA0, CVisibilityPlugins::InsertAtomicIntoSortedList, PATCH_JUMP);
+	InjectHook(0x528C50, CVisibilityPlugins::SetRenderWareCamera, PATCH_JUMP);
+
+	InjectHook(0x527F60, SetAlphaCB, PATCH_JUMP);
+	InjectHook(0x529040, CVisibilityPlugins::RenderAlphaAtomics, PATCH_JUMP);
+	InjectHook(0x529070, CVisibilityPlugins::RenderFadingEntities, PATCH_JUMP);
+
+	InjectHook(0x527F70, CVisibilityPlugins::RenderWheelAtomicCB, PATCH_JUMP);
+	InjectHook(0x528000, CVisibilityPlugins::RenderObjNormalAtomic, PATCH_JUMP);
+	InjectHook(0x5280B0, CVisibilityPlugins::RenderAlphaAtomic, PATCH_JUMP);
+	InjectHook(0x528100, CVisibilityPlugins::RenderFadingAtomic, PATCH_JUMP);
+
+	InjectHook(0x5283E0, CVisibilityPlugins::RenderVehicleHiDetailCB, PATCH_JUMP);
+	InjectHook(0x5284B0, CVisibilityPlugins::RenderVehicleHiDetailAlphaCB, PATCH_JUMP);
+	InjectHook(0x5288A0, CVisibilityPlugins::RenderVehicleHiDetailCB_BigVehicle, PATCH_JUMP);
+	InjectHook(0x528A10, CVisibilityPlugins::RenderVehicleHiDetailAlphaCB_BigVehicle, PATCH_JUMP);
+	InjectHook(0x528AD0, CVisibilityPlugins::RenderVehicleHiDetailCB_Boat, PATCH_JUMP);
+	InjectHook(0x5287F0, CVisibilityPlugins::RenderVehicleLowDetailCB_BigVehicle, PATCH_JUMP);
+	InjectHook(0x528940, CVisibilityPlugins::RenderVehicleLowDetailAlphaCB_BigVehicle, PATCH_JUMP);
+	InjectHook(0x528240, CVisibilityPlugins::RenderVehicleReallyLowDetailCB, PATCH_JUMP);
+	InjectHook(0x5287B0, CVisibilityPlugins::RenderVehicleReallyLowDetailCB_BigVehicle, PATCH_JUMP);
+	InjectHook(0x5285D0, CVisibilityPlugins::RenderTrainHiDetailCB, PATCH_JUMP);
+	InjectHook(0x5286A0, CVisibilityPlugins::RenderTrainHiDetailAlphaCB, PATCH_JUMP);
+
+	InjectHook(0x528BC0, CVisibilityPlugins::RenderPedHiDetailCB, PATCH_JUMP);
+	InjectHook(0x528B60, CVisibilityPlugins::RenderPedLowDetailCB, PATCH_JUMP);
+
+
+	InjectHook(0x527DC0, CVisibilityPlugins::PluginAttach, PATCH_JUMP);
+
+	InjectHook(0x527EC0, CVisibilityPlugins::SetAtomicModelInfo, PATCH_JUMP);
+	InjectHook(0x527F00, CVisibilityPlugins::GetAtomicModelInfo, PATCH_JUMP);
+	InjectHook(0x527F10, CVisibilityPlugins::SetAtomicFlag, PATCH_JUMP);
+	InjectHook(0x527F30, CVisibilityPlugins::ClearAtomicFlag, PATCH_JUMP);
+	InjectHook(0x527F50, CVisibilityPlugins::GetAtomicId, PATCH_JUMP);
+	InjectHook(0x528C20, CVisibilityPlugins::SetAtomicRenderCallback, PATCH_JUMP);
+
+	InjectHook(0x528D60, CVisibilityPlugins::SetFrameHierarchyId, PATCH_JUMP);
+	InjectHook(0x528D80, CVisibilityPlugins::GetFrameHierarchyId, PATCH_JUMP);
+
+	InjectHook(0x528ED0, CVisibilityPlugins::SetClumpModelInfo, PATCH_JUMP);
+	InjectHook(0x528F50, CVisibilityPlugins::SetClumpAlpha, PATCH_JUMP);
+	InjectHook(0x528F70, CVisibilityPlugins::GetClumpAlpha, PATCH_JUMP);
+
+
+	InjectHook(0x529120, CVisibilityPlugins::GetDistanceSquaredFromCamera, PATCH_JUMP);
+	InjectHook(0x5282A0, CVisibilityPlugins::GetDotProductWithCameraVector, PATCH_JUMP);
+ENDPATCHES